Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Additional Information (Detail)

v3.20.4
Long-Term Debt - Additional Information (Detail)
1 Months Ended 12 Months Ended
Jan. 15, 2021
USD ($)
Jan. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
May 03, 2019
USD ($)
Debt Disclosure [Line Items]          
Debt Issuance Costs, Line of Credit Arrangements, Gross     $ 100,000 $ 2,600,000  
Required covenant, current ratio     1.00    
Second Lien Facility     $ 200,000,000 200,000,000  
Debt Instrument, Discounted Percentage     98.00%    
Accelerated Deferred Debt Issuance Cost     $ 900,000    
Anti-hoarding provision, maximum cash     25,000,000    
Subsequent Event          
Debt Disclosure [Line Items]          
Amortization Payment   $ 1,875,000      
Credit Facility Availability   25.00%      
Revolving Credit Facility          
Debt Disclosure [Line Items]          
Maximum borrowing capacity     $ 375,000,000   $ 1,000,000,000.0
Letter of credit amount outstanding       $ 400,000  
Line of Credit Facility, Interest Rate at Period End     3.40%    
Required covenant, debt to EBITDAX ratio     3.50    
Line of Credit Facility, Current Borrowing Capacity     $ 350,000,000    
Revolving Credit Facility | Subsequent Event          
Debt Disclosure [Line Items]          
Debt Issuance Costs, Line of Credit Arrangements, Gross   $ 400,000      
Required covenant, debt to EBITDAX ratio   2.00      
Payment for Debt Extinguishment or Debt Prepayment Cost $ 80,500,000 $ 80,500,000      
Revolving Credit Facility | Minimum [Member]          
Debt Disclosure [Line Items]          
Credit facility interest rate option one, applicable margin rate over Adjusted LIBOR     1.50%    
Revolving Credit Facility | Maximum [Member]          
Debt Disclosure [Line Items]          
Credit facility interest rate option one, applicable margin rate over Adjusted LIBOR     2.50%    
Credit facility interest rate option two, applicable margin rate     3.50%    
Commitment fees for undrawn credit facility     0.50%    
Second Lien Facility          
Debt Disclosure [Line Items]          
Credit facility interest rate option one, applicable margin rate over Adjusted LIBOR     7.25%    
Credit facility interest rate option two, applicable margin rate     8.25%    
Second Lien Facility, Initial Interest Rate     8.34%    
Second Lien Facility, Effective Interest Rate     9.89%    
Interest Rate Floor     1.00%    
Second Lien Facility | Interest Payable One [Member]          
Debt Disclosure [Line Items]          
Debt Instrument, Interest Payable Period     1 month    
Second Lien Facility | Interest Payable Two [Member]          
Debt Disclosure [Line Items]          
Debt Instrument, Interest Payable Period     3 months    
Second Lien Facility | Interest Payable Three [Member]          
Debt Disclosure [Line Items]          
Debt Instrument, Interest Payable Period     6 months    
Second Lien Facility | Subsequent Event          
Debt Disclosure [Line Items]          
Debt Issuance Costs, Line of Credit Arrangements, Gross   $ 1,400,000      
Credit facility interest rate option one, applicable margin rate over Adjusted LIBOR   8.25%      
Credit facility interest rate option two, applicable margin rate   9.25%      
Repayments of Debt   $ 1,300,000      
Asset Coverage Ratio   1.25      
Payment for Debt Extinguishment or Debt Prepayment Cost $ 50,000,000.0 $ 50,000,000.0      
Write off Deferred Debit Issuance and Original Issuance Costs   $ 1,300,000      
First Lien [Member]          
Debt Disclosure [Line Items]          
Required covenant, debt to EBITDAX ratio     2.50    
Letter of Credit          
Debt Disclosure [Line Items]          
Maximum borrowing capacity     $ 25,000,000    
Year 1 | Second Lien Facility          
Debt Disclosure [Line Items]          
Prepayment Premium     102.00%    
Year 2 | Second Lien Facility          
Debt Disclosure [Line Items]          
Prepayment Premium     101.00%